I'm just about to put a 1.8 Pinto in mine until the man from the ministry has had his way.
Then I plan to put a Vauxhall C20XE engine in, complete with bike throttles and a megasquirt. You can match the type 9 to an XE with an adaptor bellhousing from SBD -
http://www.sbdev.co.uk/Gearbox/Bellh...Bellhouses.htm
And I think there are a few tweaks required to the clutch, combining a ford drive plate and so on to get everything to match up. As far as I can see this engine seems to provide the best 'bang per buck' of the popular engines out there.